Irregular Sudoku is very interesting Classic Sudoku variation. In this variation. all the rules of Classic Sudoku remain intact except that instead of 3x3 region, we have irregular regions in Irregular Sudoku puzzle. This is the reason it is known with the name Irregular Sudoku. This Sudoku type is also known with the very famous name Jigsaw Sudoku. Both these name Irregular Sudoku and Jigsaw Sudoku are used in this website for this type of puzzle.

Rules of 9x9 Irregular Sudoku Puzzle
Place a digit from 1 to 9 in each empty cell so that each digit appears exactly once in each row, column and outlined region. Each outlined region is marked by thick borders.

### NUMBER PLACE (QC-23)

Rules of 6x6 Irregular Sudoku Puzzle
Place a digit from 1 to 6 in each empty cell so that each digit appears exactly once in each row, column and outlined region. Each outlined region is marked by thick borders.

### Irregular Sudoku (Mini Sudoku Series #2)

There are many Sudoku variations which are based upon Jigsaw Sudoku puzzle. Links to these Sudoku variations are also given as below.

### Lexamino (QC-1)

Checkout more Sudoku Variations by clicking on the below image
 Sudoku Variations Main Page